Solid particle erosion of Al alloy and Al-alloy composites: Effect of heat treatment and angle of impingement

Abstract

Erosive wear behavior of the as-cast and heat-treated Al alloy and the Al-alloy-SiC particle composite against Al 2 O 3 erodent has been examined at different angles of impingement (15 to 90 deg). It has been noted that the cast Al alloy exhibited a higher erosion rate than the heat-treated alloy and composites irrespective of the angle of impingement. It is noted that the as-cast and heat-treated Al alloy exhibited a maximum wear rate at the 45 deg angle of impingement, whereas the composite, in as-cast as well as in heat-treated conditions, showed a maximum erosion rate at the 60 deg angle of impingement. Subsurface studies of the alloy and composite confirm that the material loss, during erosive wear, is primarily due to microcutting/microplowing (i.e., abrasive-type) and microfracture (i.e., impact-type) actions. At a low angle of impingement, the abrasive type is the dominating factor for material removal, and at a higher angle of impingement, both the impact-type and abrasive-type actions play critical roles. The impact type is mainly localized at the tip of the erosion profile, while the abrasive type takes place along the sidewalls of the profile. This is explained on the basis of the erosion mechanism using a schematic diagram.

Solid particle erosion of composite materials: A critical review

“…Das et al. 114 performed solid particle erosion experiments of SiC particle reinforced Al alloy composites (SiC/Al). The average size of SiC particle was 75 µm, and its weight content was 10 wt%.…”

“…Their results showed that the inclusion of in situ TiB 2 particles improved the erosion resistance of unreinforced A356 alloy as in the case of Das et al.’s study. 114 They supposed that the higher hardness of TiB 2 than that of SiC erodent particle and good bonding strength between TiB 2 particles and Al 116 led to the improvement of erosion resistance compared with the neat A356 alloy. Similar result was obtained in solid particle erosion experiments of aluminum reinforced with redmud composite 117 and bronze reinforced with diamond particulate composite.…”

Erosion behavior of 440C stainless steel cryogenically treated

“…Finnie (1995 classified them in 3 categories: fluid flow conditions, particle properties and surface properties. Some of these have been studied by others authors: impact angle (Das et al, 2004;Nguyen et al, 2014), particle speed (Stevenson et al, 1995;Yabuki et al, 1999) and particle rotation (Deng et al, 2004;Nguyen et al 2015). And among the particle properties (Bousser et al, 2013;Murugesh et al, 1991): size (Macchini et al, 2013;Nguyen et al, 2016;Venugopal Reddy et al, 1991), shape (Akbarzadeh et al, 2012;Feng et al, 1999;Laguna-Camacho et al, 2015;Naveed et al, 2016;Vite-Torres et al, 2013), and hardness (Arabnejad et al 2015).…”

Performance Analysis of Chromium Carbide Overlay in Coal Nozzle Tip for Utility Boilers

“…The flow of coal powder air mixture wrapping the inner shrouds and it create eddies which accelerate erosion. Erosion and wear are the mechanism of mass loss due to abrasion at high velocity of coal powder and subjected to continuous impingement of coal particles at leading edges of the discharge points [1], [2]. Erosion in the product are many reasons, inadequate primary air, higher swirl of fuel-air mixer, fuel flow velocity, fire ball location, tip shape, overheating and temperature of the system [4].…”